diff --git a/functions/src/gateway/controller.ts b/functions/src/gateway/controller.ts
index ae3ff0ab..e7b9a1b7 100644
--- a/functions/src/gateway/controller.ts
+++ b/functions/src/gateway/controller.ts
@@ -10,6 +10,7 @@ import {getAppCheck} from 'firebase-admin/app-check';
 import {avatars} from './avatars';
 import {me} from './me';
 import {spokenToSigned} from './spoken-to-signed';
+import {optionsRequest} from '../middlewares/options.request';
 
 // The public APP ID of the sign-mt web app
 const APP_ID = '1:665830225099:web:18e0669d5847a4b047974e';
@@ -50,7 +51,7 @@ const app: Application = express();
 app.use(cors());
 app.use(unkeyAuth);
 app.use(getAppCheckKey);
-app.options('*', (req, res) => res.status(200).end());
+app.options('*', optionsRequest);
 
 spokenToSigned(app);
 me(app);
diff --git a/functions/src/middlewares/options.request.ts b/functions/src/middlewares/options.request.ts
new file mode 100644
index 00000000..891eeeff
--- /dev/null
+++ b/functions/src/middlewares/options.request.ts
@@ -0,0 +1,5 @@
+import * as express from 'express';
+
+export function optionsRequest(req: express.Request, res: express.Response) {
+  res.status(200).end();
+}
diff --git a/functions/src/text-normalization/controller.ts b/functions/src/text-normalization/controller.ts
index 66a7c749..d652394a 100644
--- a/functions/src/text-normalization/controller.ts
+++ b/functions/src/text-normalization/controller.ts
@@ -9,6 +9,7 @@ import {onRequest} from 'firebase-functions/v2/https';
 import {defineString} from 'firebase-functions/params';
 import {appCheckVerification} from '../middlewares/appcheck.middleware';
 import type {StringParam} from 'firebase-functions/lib/params/types';
+import {optionsRequest} from '../middlewares/options.request';
 
 export class TextNormalizationEndpoint {
   constructor(private database: FirebaseDatabase, private OpenAIApiKey: StringParam) {}
@@ -106,7 +107,7 @@ export const textNormalizationFunctions = (database: FirebaseDatabase) => {
   const app = express();
   app.use(cors());
   app.use(appCheckVerification);
-  app.options('*', (req, res) => res.status(200).end());
+  app.options('*', optionsRequest);
   app.get(['/', '/api/text-normalization'], request);
   app.use(errorMiddleware);